[Bug c++/51138] [C++0x] [4.6 Regression] Uninitialized list elements

[redi at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51138

Jonathan Wakely <redi at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2011-11-15
     Ever Confirmed|0                           |1

--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> 2011-11-15 
10:08:44 UTC ---
Confirmed.

With -std=c++0x the constructor calls this with an empty parameter pack:

      template<typename... _Args>
        void
        emplace_back(_Args&&... __args)
        { this->_M_insert(end(), std::forward<_Args>(__args)...); }

which calls allocator::construct with an empty pack:

        _M_get_Node_allocator().construct(__p,
                                          std::forward<_Args>(__args)...);

which does

      template<typename... _Args>
        void
        construct(pointer __p, _Args&&... __args)
        { ::new((void *)__p) _Tp(std::forward<_Args>(__args)...); }